P0016

P0016-CRANKSHAFT/CAMSHAFT TIMING MISALIGNMENT - BANK 1 SENSOR 1





For complete wiring diagrams refer to Diagrams/Electrical.


Theory of Operation

The crankshaft position and camshaft position sensors are hall effect type sensors. The ECM provides a 5-volt supply to the position sensor and a return circuit. As the teeth on the crankshaft speed ring or the lobes on the camshaft gear passes past the position sensor, a signal is generated on the position sensor signal circuit. The ECM interprets this signal and coverts it to an engine speed. A missing tooth on the crankshaft gear is used to determine the position of the engine by the ECM.

- When Monitored:

While Engine is running. The ECM monitors the position of the missing tooth on the crankshaft speed sensor target and the camshaft speed sensor target. It the two positions do not match, the ECM then determines that there is a mechanical mis-alignment between the two sensors.

- Set Condition:

The ECM illuminates the MIL light immediately when the diagnostic runs and fails. The ECM will turn off the MIL after the diagnostic runs and passes in 4 consecutive drive cycles. If the fault is active the engine will run derated and hard start/rough idle is possible.






Diagnostic Test


1. DAMAGE TO THE ESS OR EPS

Visually inspect the condition of the tone wheel, ESS, and EPS for damage.

Are any of the components damaged?

Yes

- Repair or replace any damaged component.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 2

2. MECHANICAL MISALIGNMENT OF THE ESS OR EPS

Verify the speed indicator ring is properly positioned relative to the locating pin in the front face of the crankshaft.

Is the speed indicator ring properly installed?

Yes

- Go To 3

No

- Repair the speed ring indicator ring installation.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

3. MECHANICAL MISALIGNMENT OF THE CAMSHAFT AND CRANKSHAFT GEARS

Check the mechanical alignment of the camshaft gear to the crankshaft gear.

Are the gear teeth in proper alignment?

Yes

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

No

- Repair the gear alignment.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test